High vinyl polybutadiene or styrene-butadiene copolymer

Details High vinyl polybutadiene or styrene-butadiene copolymer High vinyl polybutadiene or styrene-butadiene copolymer

C - Chemistry, Metallurgy

08

F

402/9, 402/7.3

C08F 2/00 (2006.01) B65H 75/40 (2006.01) C08C 19/44 (2006.01) C08F 36/06 (2006.01) C08G 81/02 (2006.01) D21H 13/44 (2006.01)

Patent

CA 1169186

ABSTRACT OF THE DISCLOSURE High vinyl polybutadiene or styrene-butadiene copolymer obtained by polymerizing 1,3-butadiene alone or with styrene in a hydrocarbon solvent using an organolithium compound as an initiator and coupling the resulting polymer, characterized in that (1) the polybutadiene or styrene-butadiene copolymer comprises at least 20% by weight of a polymer having in its molecular chain a linkage between butadienyl and at least one element selected from the group consisting of silicon, germanium, tin and lead, (2) the styrene content of said copolymer is 40% by weight or less, and (3) the polybutadiene or the butadiene portion of the styrene- butadiene copolymer has a vinyl content of 50 to 95%. Said polybutadiene or sytrene-butadiene copolymer has a low rolling resistance, high wet skid resist- ance, highly improved fracture property and, an excellent processability.

386112

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